If an unfertilized egg is pricked with a micro needle, it will

The correct answer is "start dividing".

In developmental biology, fertilization involves two main processes: activating the egg to start development (metabolic activation and initiation of cell division) and introducing the sperm's genetic material.
When an unfertilized egg is pricked with a micro needle, it undergoes a process known as artificial parthenogenesis. The physical pricking mimics the entry of a sperm cell by causing a transient increase in calcium ion levels within the egg's cytoplasm.
This spike in calcium ions triggers egg activation, leading the egg to resume the cell cycle and start dividing, even in the complete absence of genetic material from a sperm.